Parallel lift for furrow openers



April 29, 1'941. e. M. KRIEGBNJM PARALLEL LIFT FR FURKW OPENERS Fiied Jan. s1, 1940 2 Sheets-Sheet 1 April 1941- G. M. KRIEGBAUM PARALLEL LIFT FOR FURROW OEENERS l Fi1ed Jan. 31, 1940 2 Sheet s-Sheet 2 EORGNKRIEGBAWI BY ATTX v Patented Apr. 29, 1941 PARALLEL LIFT FOR rumsow OPENERS George M. Kridgbaum, Richmoml, lnd.,assignor to International Harvester Company, a, corporation of New Jersey Application January 31, 1940, Serial N0. 316,495

6 Claims. (C1. 97184) This invention relates to a furrow opener. More specifically it relates to a parallel litt for a furrow opener.

An.= object o;f the present invention is 130 provide an improved furrow opener.

A further -object is the provision of an improved iurrow opener having a parallel lift.

Another object is 110 provide a release for a furrow opener having a parallel lift.

Still another objeci; is the provision of a parallel lift for a'furrow opener which includes a release.

According to thepresent invkention, a connecting linkage, including parallel links, connects a furrowopener With a supporting frame, thereby providing a parallel litt for the furrow opener. The connection of one f the links with the frarne is releasable, so that the furrow opener may yielcl upon striking an obstruction.

In the drawinss:

Figure 1 is a side elevation of a portion of a drill having a furrow opener lifted by the parallel links of the present invention;

Figure 2 is a side view of a portion of some of the parts shown in Figure 1, with the furrow opener in ground-engaging posiizionrather than in raised position;

Figure 3 is a plan view of the partsshown in Figure 2; and,

Figure 4 is a sectional vlewtaken on the line 4-4 of Figure 1.

Figure 1 shows parts of a dri1l which include a. furrow opener I0, a supporting framework II, a seed box I2, and a seed tube I3 leading from the seed box to the furrow opener. The supporting framework II includes as a part; thereof a transversely extending angle member I4 to which is attached a bracket; I5 by bolts I5 and nuts I'I. The bracket I5 has ears I8 at i ts extremities, a depending portion I9, and ears 20, positioned in spaced relation centrally of the bracket and having at their lower ends bearing portions 2I connected with the depending portion I9.

A pin 22 pivotally connects a pair of links 23 and 24 to the ears I8. As seen in Figure 3 these links 23 and 24 converge toward one another and are secured together a1: a central portion by means of an inverted channel member 25 and a holt 26 passing through the links in the channel member. The links 23 and 24 are pivotally connected to the furrow opener at their ends by means of pins 21 secured, as by welding, at 28 110 opener I0. A strap 30 is secured in spaced relation I;o the link 23 by means of a holt 3I, holt 32, and sleeve 33. The end of a member 34 fits in the space between the strap 30 and the link 23 and is pivotally secured t0 the strap and the link by means of a pin- 35. A coil spring 36 suran arcuate toothed member 42.

lever 150 the bracket.

. the link 4a. in an openi'ng in an end of the lever 44 and rounds the member 34 and has its lower end secured to ehe member by means of a W-shaped Pin 3'I. A trunniorr member 38 is secured 170 the upper and of the spring and is pivotally comnected with an arm 39 secured to a shaft 49 formed as part of a lever arm 4I and pivoted on A pin 3B extending through the upper end of the member 1 34 limits the up=ward movement of Ishe trunnion member 38.

The lever arm 4I has a. detent mechanism 43 which permits the arm 4I to be sei: in a number of angular posibions, the detent mechanism engaging the teeth of the arcuate member 42.

A lever 44 fifis between the ears 20 of the bracket I5, and a pin 45 pivotally connects the The lever 44 has spaced portions 46 and 4'I, between Which a link 49 and a member 49 extend. The member 49 is pivotally connected to one extremity of the lever 44 by means of a pirr 50. A holt 5I is threaded into the member 49 and is secured by means of a nut 52 1:0 a clip 53 secured the under side of A spring 54 has one end secured the other end secured by means of an eye holt 56 a clip 51 secured to the upper side of a midpoint of the link 4.8. One end of the link 48 extencls into the furrow opener I0 and is pivotally secured thereto by meau-s of a pin '58.

A bolt 59 is adjustably secured by .a nut 00 to a portion EI of the lever 44 into which the holt 59 is threaded.

II; Will be observed that the links 23 and 24 constitute in efiect one link, since they are sein openings in bearing portions 29 in the furrow cured to one another. as one, and the link 48 constitu1pe in eifect a parallel lift for the furrow opener III. Figure 2 shows the furrow openerin its lowered. or groundengaging posibioh. Figure 1 shows the furrow opener in raised or transport position. The mising oi the opener is accomplished by angular movement of Ehe lever arm 4I, Which acts through the arm 39, collar 38 pin 38, and member 34 to exert a pull upon the links 23 and 24 and thereby to ra ise the furrow opener II]. During this raising the lever arm 48 pivots about the pin 45 which supports the lever 44 in the bracket I5. This is true because the spring 54 causes the These two links, acting link 48 to ahnt the head of the holt 59 and thereby to make the lever 44 and link 48 move as one. When an obstruetion is encountereda ferne is exerted n th-e lower end of the furrow opener much greater than the usual pull of the ground on the opener. When the force issuificient, the furrow opener is moved from the full line position 150 the dotted line position 0f Figure 2 and thereby causes a lengthwise movement 0f the link 48, which is permitted by a relative angular movement of the lever 44 with respect to the link 48, as shown in th-e change of position of these part's from full line position to dotted line position. By means 0f adjustmenb of the holt 5I, the lengthwise position of.the link 48 may be adjusted with respect to the lever M, and thereby the angle of the furrow opener I0 .is ehanged.

It will be seen from the foregoing description that a new and. nove l furrow opener construction has been provided by which the furrow opener is connected to a supporting framework by means of parallel links, and the conneetion of one of the links is releasable, so that a tripping may take plane when the furrow opener encounters an obstruetion. 'Ihe indzention is 130 limit the invention only Within the terms of the appended claims.

What is claimed is:

1. In combination, a furrow opener, a firsi; link having one end pivotally corinected 130 the fu.rrow opener, a second link generally parallel 130 the first link and having one end pivotally connected to the furrow opener at a point spaced from the connection of the furrow opener and the first link, a support pivotally connected 120 the end of the first link opposite the end connected to the furrow opener. a lever pivotally connected at a mid-point 130 the support and at one end 110 the end of the second link opposite the end to which the furrow opener is connected, and a spring counecting the other end of the lever and an intermediate point of the second link.

2. In combination, an implement. a support, a first link pivotally connected at one end to the support and ab the other end to the implement a second link pivotally connected at one end t0 the implement at a point spaced from the connection of the first link and the imnlement, a lever pivotally mounted ab a mid-point to a point on the support spaced from the connection of the first link and the support, and having one arm pivotally connected to the end of the second link opposite the end connected to the implement and. a portion of the other arm abutting the second link. and means yieldingly urging the said part c' f the lever arm against the link. wherebry the implement has a substantially parallel movement between a ground-engaging position and a transport, a second link positioned in generally parallel spaced relation 1:0 the first link and Connected to the implement als a point spaced from the connection of the implement and the first link, a third link connected to tne support at a point spaced from the connection of the first link and. the support and extending a1ong the second link t0 a point of connectlon with the seeond link spaced a greater distance from the connection of the second link with the implement than the counection o1 the third link and the support is spaced, and resilient means resisting angular movement of the second link witl1 respect to the third link.

4. In combination, an implement, a support, a first link connecting the implement and the support, a second link positioned in generally parallel spaced. relation and connected the implement at a point; spaced from the connection of the implement and the first link, a lever nonnected at a mi d-point to the support at a point spaced from i;f1e Connection of the first link and the support and having one arm extending along the second link to a point of Connection therewith spaced a greater distance from the connection of the second link With the implement than connection 615 the lever and the support is spaced, and a spring connecting the other arm of the lever and an intermediate point cf the second link.

5. In combination, a furrow op.ener, a support, a pair of parallel links embracing the furrow opener, means pivotally connecting the links t0 the furrow opener on the same axis, means pivotally connecting the links t'0 the support on an axis parallel to the said same axis, a third link extending into the furrow opener, means pivotally connecting the third link to the fnrrow opener on an axis spaced from the axis en Which the pair of links are pivotally connected 130 the furr0w opener, a lever pivotally connected at a mid-point to the support on an axis spaced from the pivot axis of thepair of levers an the support and having two arms and. being formed of spaced portions, the third link extending abetween the spacecl portions and being pivot ally connected to ing the other arm of the lever and a mid-point of the third link for holding-the third link in sontact with the lever.

6. In combination, an implement, a sum5drt, a

first link connecting the implement and the support a second link positioned in generally parallel spaced relation to the first link and connected to the implement at a point spaced from the connection of the implement and the first link, a third link conneeting the second link and the support, and resilient means resisting angular movement of the second link with respectto the third link. 1

GEORGE M. KRIEGBAULL 

